PHILADELPHIA (CBS) — Pennsylvania Department of Transportation road crews will be out, all over the region, for more than a year, repairing and adding reflective road markers.

The road crews will be working on the raised pavement markers (“RPMs,” in PennDOT lingo) — those reflective bumps which are installed along the edge lines, center lines, and ramps to improve visibility and keep you in your lane.

“They’re a little bit raised, so when motorists drive and make contact with these pavement markers, it alerts them that they’re a little too far over on the road,” explains PennDOT spokesman Brad Rudolph.

He says the work is being done in all five counties of Southeastern Pennsylvania, on several major roads.

“(Interstates) 76, 95, 476, Route 1, Route 202, Route 422, the main arteries,” including Route 309, he tells KYW Newsradio. “It’s a slow-moving operation. It’s not going to close roads, but it will slow down a lane here and there.”

Rudolph suggests you get used to the work, because the $300,000 project is expected to last through October of next year.